Yamaha DX21
This time, a fairly typical service of a vintage instrument. The following were replaced:
- all electrolytic capacitors in the audio path, including bipolar ones (the instrument had a quiet and distorted output sound),
- all control panel switches (50 pieces),
- 3 slider potentiometers,
- the leaking LCD display with a replacement unit featuring built-in backlighting.
In addition, the instrument was thoroughly cleaned both inside and out. An ultrasonic cleaner was used for the control elements (plastic caps).